Hot-mill furnace.



O. B. GOLDING.

HOT MILL FURNACE.

APPLICATION FILED JUNE-30. 1914.

$338,555., Patented May 4,1915.

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0. B. GOLDING.

HOT MILL FURNACE.

APPLICATION FILED JUNE 30,1914. 1 1,555 Patented May 4, 1915.

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THE NORRIS PETERSKCQ. PHOTO-LITHO., WASHINGTON. D4 C.

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OLIVER B. GOLDING, 0F ELWOOD, INDIANA.

HOT-MILL FURNACE.

- Specification of Letters Patent.

Patented May 4, 1915.

Application filed June 30, 1914. Serial No. 848,267. I

To all whom it may concern Be it known that I, OLIVER B. GOLDING, a citizen of the United States, residing at Elwood, in the county of Madison and State 'provements in the construction of the furnace bottom to prevent the formation of scale and the accumulation of dirt on the furnace bottom and to also increase the efficiency of the furnace bottom in its efiect in heating the steel bars and to avoid the necessity of cleaning the furnace bottom at short periods of time, another object being to increase the durability as well as the efiiciency of the furnace bottom.

With the above and other objects in View the invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings :-Figure 1 is a vertical sectional view of a hot mill furnace provided with a bottom or floor constructed in accordance with my invention. Fig. 2 is a horizontal sectional view of the same. Fig. 3 is a transverse sectional View of the same. Fig. 1 is a detail elevation of one of the cast iron bricks arranged and used in the construction of the furnace bottom. Fig. 5 is a plan of the same. Fig. 6 is a detail horizontal sectional view of the rear portion of the furnace.

The furnace 1 is provided with the usual fire box 2, grate 3, ash pit 4:, heating chamber 5 and bridge wall 6. The charging door is indicated at 7 and the smoke stack at 8.

My improvements relate more especially to the construction of the bottom of the furnace or that portion thereof which forms the floor of the heating chamber 5. The floor line of the furnace is indicated at 9 and in accordance with my invention 1 provide a series of spaced walls 10 on the floor 9 which walls may be constructed of fire brick or other suitable material and in practice are four and one half inches wide, four and one half inches high and are spaced four and one half inches apart. These dimensions may however be varied without dethe walls 10, through vertical openings 12.

The walls 10 are constructed with openings 13 which extend through them and immediately above the floor 9 to permit heat to circulate below the bottom of the furnace heating chamber 5 and to equalize the heat at all points in the bottom of the chamber- The bottom 14 of the heating chamber 5 is, in accordance with my invention, con structed of alternately arranged fire brick 15 and cast iron bricks 16, the fire brick being placed flatwise and the cast iron bricks being placed edgewise so that the'upper portions of the cast iron bricks extend through and above the upper surfaces of the intermediate fire brick, as clearly shown in Figs. 1 and 3. On opposite sides of the cast iron bricks 16 are lugs 17 which enter the spaces between the ends of the fire brick and serve to hold the latter in place. The cast iron bricks are provided at their upper side edges with notches 18 and each cast iron brick has a longitudinal bore 19 and is provided at one end with a projecting nipple 20 to enter the bore of the next adjacent brick so that a continuous bore or passage is formed through each series of cast iron bricks, from end to end of the floor. The bridge wall 6 is provided with a bore 21 which extends therethrough and is provided with openings 22 which communicate with the bores or channels 19 and is also provided with vertical bores 23 which extendfrom the bore or channel 21 to the upper side of the bridge wall. The rear wall of the furnace also has a bore 24: with which the bores 19 communicate as at 25. Hence when the furnace is in operation air is drawn in through the bore 25, passes through the bores 19 of the series of cast iron bricks and passes through the bores 21 and 23 in the bridge wall up into the furnace. The air which is thus caused to pass through the fire bricks serves to prevent them from becoming unduly heated. The air also by being heated during its passage through the cast iron bricks is discharged into and combines with the gases of combustion as they pass from the fire boX 2 over the bridge wall and into the heating chamber 5 and thus serves to greatly promote combustion, efiect an economy in the use of fuel and increase the heating efliciency of the furnace.

The cast iron bricks present raised surfaces above the fire brick 15 on which the bars rest while being heated, serve thus to space the bars above the fire brick bottom 15 so as to permit the free circulation of heat under said bars so that the heating e'fliciency of the furnace is-greatly increased. Moreover by thus spacing the bars above the fire brick bottom scaling is prevented or very greatly reduced and moreover the bars are kept clean while being heated. The cast iron bricks are extremely durable and hence require renewing only at long periods of time. The dirt is prevented from accumulating on the bottom and passes from the spaces between the walls 10 through the openings 12 into the clean-out channel 11 and may be readily removed from time to time from such channel as will be understood. Hence my improved construction of o and extending above the fire bricks.

In testimony whereof I affix my signature in presence of two Witnesses.

OLIVER B. GOLDING. Witnesses:

M. F. ZERFAGE, O. S. NOBLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of- Patents. Washington, D. G. 

